Advertising accessory



FIG. 1 is a top front perspective view of an advertising accessory showing the claimed design in an environment in which it may be used;

FIG. 2 is a top front perspective view of the advertising accessory;

FIG. 3 is a top rear perspective view thereof;

FIG. 4 is a bottom rear perspective view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a top view thereof; and,

FIG. 10 is a bottom view thereof.

The dashed broken lines in the figures show portions of the advertising accessory and environment that form no part of the claimed design.

The dot-dash broken lines in the figures show boundaries that form no part of the claimed design. 

CLAIM The ornamental design for an advertising accessory, as shown and described. 